Nouns

(n)counterpart, opposite number, vis-a-visa person or thing having the same function or characteristics as another
(n)love seat, loveseat, tete-a-tete, vis-a-vissmall sofa that seats two people

Adverbs

(r)vis-a-visface-to-face with; literally `face to face'“they sat vis-a-vis at the table”, “I found myself vis-a-vis a burly policeman”